+ * Uses a crc32 algorithm by default, but if you put
+ * the following in config/config_local.php, you can
+ * force md5 instead:
+ * $hash_dirs_use_md5 = TRUE;
+ *
+ * You may also specify that if usernames are in full
+ * email address format, the domain part (beginning
+ * with "@") be stripped before calculating the crc
+ * or md5. Do that by putting the following in
+ * config/config_local.php:
+ * $hash_dirs_strip_domain = TRUE;
+ *